Eric Cantor has violated the Logan Act, a largely symbolic law that is pretty much unenforceable. Yawn. Everyone knows Eric Cantor cares nothing for the United States. This isn't news.
Long story short, Eric Cantor pledged to a foreign prime minister that he would actively work to subvert the policy of the United States' government towards that prime minister's country.
The GOP, funded by foreign governments, working for foreign governments.